优化下载逻辑，已下载文件不进行下载，使用时请删除download方法的return

app/command/Zm.php

@@ -74,7 +74,7 @@ class Zm extends Command
                         $this->savetxt($introduce,$curr_item['introduce']);
 
                         $cover = $curr_item['cover'];
-                        $this->download($cover,$c);
+                        $this->download($cover,$c,basename($cover));
 
                         $cover_name = basename($cover);
                         $cover_path = "{$c}/{$cover_name}-下载地址.txt";
@@ -84,20 +84,36 @@ class Zm extends Command
                             $class_path = $c . '/' . $class['title'];
                             is_dir($class_path) || mkdir($class_path,0755,true);
                             $class_details = $this->getClassDetails($class['id']);
+                            if($class_details == false){
+                                dump('课程未授权，跳过下载',$class['title']);
+                                break;
+                            }
                             dump($class_path,$class_details);
                             $class_id = $class_details['data']['classSection']['id'];
 
                             if(!empty($class_details['data']['classSection']['video'])){
-                                $this->download($class_details['data']['classSection']['video'],$class_path);
+                                $file_name = urldecode(basename($class_details['data']['classSection']['video']));
+                                $downloadurl = $class_path . '/' . $file_name . '-下载地址.txt';
+                                $this->savetxt($downloadurl,$class_details['data']['classSection']['video']);
+                                $this->download($class_details['data']['classSection']['video'],$class_path,$file_name);
                             }
                             if(!empty($class_details['data']['classSection']['courseware'])){
-                                $this->download($class_details['data']['classSection']['courseware'],$class_path);
+                                $file_name = urldecode(basename($class_details['data']['classSection']['courseware']));
+                                $downloadurl = $class_path . '/' . $file_name . '-下载地址.txt';
+                                $this->savetxt($downloadurl,$class_details['data']['classSection']['courseware']);
+                                $this->download($class_details['data']['classSection']['courseware'],$class_path,$file_name);
                             }
                             if(!empty($class_details['data']['classSection']['construction_draw'])){
-                                $this->download($class_details['data']['classSection']['construction_draw'],$class_path);
+                                $file_name = urldecode(basename($class_details['data']['classSection']['construction_draw']));
+                                $downloadurl = $class_path . '/' . $file_name . '-下载地址.txt';
+                                $this->savetxt($downloadurl,$class_details['data']['classSection']['construction_draw']);
+                                $this->download($class_details['data']['classSection']['construction_draw'],$class_path,$file_name);
                             }
                             if(!empty($class_details['data']['classSection']['construction_draw_3d'])){
-                                $this->download($class_details['data']['classSection']['construction_draw_3d'],$class_path);
+                                $file_name = urldecode(basename($class_details['data']['classSection']['construction_draw_3d']));
+                                $downloadurl = $class_path . '/' . $file_name . '-下载地址.txt';
+                                $this->savetxt($downloadurl,urldecode($class_details['data']['classSection']['construction_draw_3d']));
+                                $this->download($class_details['data']['classSection']['construction_draw_3d'],$class_path,$file_name);
                             }
                             
                             foreach($class_details['data']['classSection']['allEnclosure'] as $enclosure){
@@ -109,7 +125,7 @@ class Zm extends Command
                                 is_dir($storage) || mkdir($storage,0755,true);
                                 $downloadurl = $storage . '/' . urldecode(end($parts)) . '-下载地址.txt';
                                 $this->savetxt($downloadurl,urldecode($enclosure['url']));
-                                // $this->download($enclosure['url'],$storage);
+                                $this->download($enclosure['url'],$storage,basename($enclosure['url']));
                             }
                         }
                     }
@@ -131,6 +147,16 @@ class Zm extends Command
     private function checkfile($url,$file)
     {
         dump($url,$file);
+        if(is_file($file)){
+            $size = filesize($file);
+            if($size > 0){
+                return true;
+            }else{
+                dump('文件大小为0，重新下载'.$file);
+                unlink($file);
+                return 2;
+            }
+        }
         $key = 'zm_check_header_' . md5($url);
         try {
             if(($head = Cache::get($key,null)) === NULL ){
@@ -157,7 +183,6 @@ class Zm extends Command
                     foreach ($headers as $name => $values) {
                         $head[$name] = implode(', ', $values);
                     }
-                    dump($head);
                 } catch (\GuzzleHttp\Exception\RequestException $e) {
                     dump("文件head请求失败: " . $e->getMessage());
                     return 0;
@@ -191,13 +216,20 @@ class Zm extends Command
         }
         return 3;
     }
-    protected function download($downloadurl,$dir,$filename = null)
+    protected function download($downloadurl,$dir,$filename)
     {
+        return;
+        $result = $this->checkfile($downloadurl,$dir . '/' . $filename);
+        
+        if($result === true){
+            dump('文件已存在，跳过下载：' . $filename);
+            return;
+        }
         $num = 1;
         while($num > 0){
             $activeDownloads = $this->aria2->getGlobalStat();
             $num = intval($activeDownloads['result']['numWaiting']);
-            if($num > 10){
+            if($num > 50){
                 dump('当前任务过多，等待任务数：',$num);
                 sleep(1);
             }else{
@@ -314,6 +346,8 @@ class Zm extends Command
             return $this->getClassDetails($curr_id,$result['sign']);
         }else if($result['code'] == 0){
             return $result;
+        }else if($result['code'] == -5){
+            return false;
         }else{
             dump($result['msg']);
             exit();